- Abstract:
- We show that if the ground state entanglement exceeds the total entropy of a given system, then this system is in an entangled state. This is a universal entanglement witness that applies to any physical system and yields a temperature below which we are certain to find some entanglement. Our witness is then applied to generic bosonic and fermionic many-body systems to derive the corresponding "critical" temperatures that have a very broad validity. © 2009 World Scientific Publishing Company.
- Publication status:
- Published
- Publisher copy:
- 10.1142/S1230161209000220
-
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- Volume:
- 16
- Issue:
- 2-3
- Pages:
- 287-291
- Publication date:
- 2009-09-05
- DOI:
- EISSN:
-
1793-7191
- ISSN:
-
1230-1612
- URN:
-
uuid:41a44219-638d-4762-8f39-6514c1a3cbc1
- Source identifiers:
-
158538
- Local pid:
- pubs:158538
- Copyright date:
- 2009
Conference
A Simple Thermodynamical Witness Showing Universality of Macroscopic Entanglement
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